Stone-saw.



J. R. PBRCB.

STONE SAW.

APPLICATION FILED AUG.4.1908.

Patented June 28, 1910.

MTN ESsEb ff tion.

- with the JOHN ROYDEN PEIROE, or NEW YORK,

MACHINERY COMPANY, OE 4NEW YORK,

N. Y., AssIcNOR To noYnEN MARBLE N. NY., A CORPORATION 0F JERSEY.

STONE-SAW.

To all 'whom 'it may concern:

Beit known that I, JOHN ROYDEN PEinCE,

a citizen of the UnitedV Staten-residing in the vborou h of Manhattan, city, county, and State of. l ew` York, have invented certain new and useful vImprovements in Stone- S aws, of which the` following is a specifica- The present invention aims yto provide a stone saw especially useful for marble or 'similar stone and usin separate removable particular. construction ands which effect an-ec`onomy jof time, efliciency and durabilit The accompanying drawings illustrate an embodiment of the invention. .j

Figure l is a face elevation of a portion of the periphery of a saw or wheel embodying the invention; it being understood that,

although the drawing shows only a portion of the saw including a single tooth, the com-.

plete .saw consists merely in a repetition of the portion shown. Fig. 2 Vis a section onthe line 2-2. 'A

The saw may be of any known or suitable type, such as a circular saw or a reciprocating saw, or it may be of cylindrical shape teeth at one edgefor counterboring Or countersinkin way of exainple approximately the .same size asthe steel teeth, each 'containing four diamonds, heretofore used; that is to say, about 2;,1 inches in the ripheral direction, and l-L- inches or more in the transverse or radial direction. In thickness they may be about a quarter of an inch, so as to project sidewise and edgewise beyond the usually 'one-eighth inch `blade and to cut in the'manner of the solid steel teeth of wood saws. The outer edges of the teeth project beyond the edge of the blade as far as is consistent with the strength of the teeth, and renewals will not be found necessary until this outwardly projecting portion is substantially worn' away. The-blade is provided with sockets at suitable intervals, preferably as close together as possible having regard for the necessary strength. The 'term longitudinal Y parallel with the direction of the out; the term transverse referring to the direction crossing the longitudinal one and in the plane of the blade. Similarly the length of each tooth is its distance in the longitudinal direction,`its width the distance in Specification of Letters raient. Patented June y AApplication led August 4, 1908. Serial No. 446,948.

The teeth' may be (by longitudinal or pe- 1s used in the sense ofplaner-of the its distance inv at rlght'angles to the plane of a transverse `direction in the blade," and its thickness the direction the blade.

Referring nowto the embodiment of the invention illustrated the removable and replaceable tooth is made with a steel back M type of fastening, and any other known style suitablemay be used. .A reduced web' which tsinto a correspondingly shaped socket in the edge plate or blade B of the `Th1s41s a common, f

P is formed at the central part of the fouten portion of 'said back M length and width to said back and so as to formshouldersupon Opposite faces (Fig. 2) and extending along thel forward and rearward transverse edges ofthe w'eb and along its inner longitudinal edge. The outer longitudinal edge P of the web coincides substantially with. that` of the back and with that of Itheblade B. A portion O of carborundum or other suitable agglomerated c1" stalline or granular material is castor mol ed upon the web. thereof-and extending to saidshoulders Q and extending also beyond the outer edge ofthe web. 'i

The web P may be provided with open-- ings R, or may be roughened or otherwise constructed to secure a yfirm grip of the carcovering both faces and nearly equal in borundum can be molded with a close en-l 'I gagement upon the face of the web P. Various other means for attaching the` carborundum to the steel back M of the tooth. may be provided, some of-which are illustrated for example in my Patent No. 894,046Mof July 2l, 1908.

The carborundum is liared toward its .outer edge, the thickness thereof being at. least as greatas that of the metal at `all points. j The tapering of Ythe faces of the tooth not onlyl facilitates molding it, but improves the quality of the work as I have found by eX- periment. VVith the liared tooth the edge of the cut on the marble-is sharper yand cleaner than with any other shape.

It' will be understood that the dimensions t tiveen successive elastic bond for the `-carborundnm is preand proportions of the parts may vary.

l For practical uses the following-principal dimensions will be satisfactoryz-length of teeth at cutting edge, inches.- Width of teeth, from 1%,- to linches. Thickness of teeth, from @5g to il; inch. Thickness of blade 5: inch. Longitudinal distance beteeth at-their outer edges, 1% inches,-tliat is to say, the teeth are approXiIna-tely the same size and spacing as the steel teeth each containing four diamonds heretofore used in similar classes of Work. Preferably the teeth Will be made as long as possible, so as to reduce the number of pai'ts andto reduce the amount' of time and labor involved in renewing the teeth of any Wheel. The angles may be sub-vr stantially as indicated on the drawings. An

ferred with this type of Wheel. A good bond for this rclass of Work is effected by mixing in the following proportions caiborundum Scper cent., rubber 10g per cent., and sulfur per cent. The carborundum, rubber and lsulfur are heated and pressed in a mold about the Web P and vulcanized in the ordinary way. For other bonds the ulial methods of manufacture will be suit.- a e.

The sha-pe of the carborundum portion O and the metal back M and especially-of the engaging portions of this carborundum and metal, may be variously modified.

A saw constructed in accordance with this invention has numerous advantages. The

Y elastic nature of the bond allows a slight tively short len yielding when the Wheel strikes one of-the i frequent irregular hard spots which are found in most marbles; while the reinforcenient provided by the metal web prevents so great a yield as inight break the-carborunduni or might result in aout too much out of 'a straight line to be acceptable. This Web may be made extremely thin because of the support vvhich it has at its two ends and its inner edge and because of its comparagth, and especially because it does not take all the strain exerted in pushing the tooth through the Work. A large part, perhaps the greater part, of this strain is in the longitudinal directions and is transmitted from the carboiundum to the shoulders Q, at one or the other-endof the tooth, accordingto the direction of rotation of the saw. This is especially true of an elastic bond. The support provided for the carborundum by the web and shoulders is carried to the edge of the blade, providing an abundant support for the integral portion of carborunduin which extends` beyond the edge and at the same time leaving this extending portion fice so that it may Wear e down practically to the edge of the blade.

\ ported "against longitudinal scenes vember 9th, 1909, have describedY and vclaimed broadly the type of saw andthe method of using it, the present application being restricted to the-particular combinations covered by the following claims. W'hat I claiin is: 1-. A saw having a blade provided With sockets along its edge and separate removable and replaceable teeth in said sockets, each of said sepa-rate teeth comprising a l metal back rigidly fastened iii a socket. in l Athe blade, a reduced web at the central part at the outer portion of said back and forming shoulders extending along its forward and rearward transverse alongitudinal edge, the outer longitudinal edge of said iv'eb coinciding` substantially with that of the back and With that of the edgesY and its innerA blade, and a portion of carborundum molded upon both faces of said web and extending to said shoulders in a longitudinal and transverse direction and extending also bevond the outer edge of said web, the carborundum being molded 'with an elastic bond and being stifened against lateral deiiection by the vembedded Web and being supand transverse strains by its transverse engagement with said shoulders.

2. A stone saw having a blade B provided with sockets along' `inovable and replaceable teeth in said sockets each of said separate teeth comprising a ll metal back Mfitting into a socket in the blade and rigidly fastened therein, a rel duced web P at the` central part of the outer portion of said back M and forming shoullders Q extending along its forward and l rearward transverse edges and .its'inner lon- 1 gitudinal edge, the outer longitudinal edge of said web coinciding substantially 4With that of the back and with thatof the iblade, andaV portion O of carborui'idum 1 molded upon both faces of said Web and eX- l tending to said shoulders Q in the longitudinal and transverse directions and extendand longitudinal its edge and separate reing alsobeyondthe outer edge of said `Web y' P, the carborunduin being molded with an elastic bond and being stiffened against latl eral defiection by the embedded Web an l being supported against longitudinal ankl transverse strains by its transverse and longitudinal engagement with said shoulder/s.

In witness whereof, T have hereunto' signed my name in the presence of tvvo subscribing Witnesses.

'Joiiiv norman reinen.

llitnesses Doiiiivco AfUsiNA, y Trinononn T. SNELL. 

